New person having difficulty with V10

I’ve just started with Vaadin today. I’m using V10 and Eclipse on Windows.
I’m simply trying to get through the tutorial to build the customer management system.
I downloaded the project base for V10 and built the base. When I try it at localhost, the web page returned is:

  • HTTP ERROR 500
  • Problem accessing /. Reason:
  • Server Error
  • Caused by:
  • java.lang.Error: Unresolved compilation problem:
  • The declared package “com.vaadin” does not match the expected package “com.vaadin.starter.skeleton”
  • at com.vaadin.starter.skeleton.Servlet.(
  • at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

What obvious step have I missed?


Hi Harry,

Which project base did you use? This one?

How did you start your server? In my machine I executed these steps and couldn’t reproduce the error (using Eclipse Oxygen 3 and Java JDK 8u172):

  1. import the project as a maven project (File > Import... > Existing Maven Projects > (Select your base project))
  2. after the project is built, right click on it at the package explorer and do Run as... > Maven build...
  3. type jetty:run at the Goals field, then click Run

![Eclipse on Windows]

That should build the project (if not yet) and run the server. Going to http://localhost:8080 should show the initial page.

Let me know if you still have any problems.